Unnamed Occurrence (ARDF - LH016; head of Hartman River), McGrath Mining District, Bethel Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - LH016; head of Hartman River) | - not defined - |
| McGrath Mining District | Mining District |
| Bethel Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 35' 38'' North , 153° 35' 20'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is in the peaks at the head of the southeast headwaters of the Hartman River. It is at an elevation of about 5,800 feet on the west flank of peak 6215. The map site is in the NW1/4 section 2, T 17 N, R 24 W, of the Seward Meridian. This is locality 5 of Cobb (1972 [MF 412]; Cobb, 1976 [OF 76-485]) and locality 20 of Gamble and others (1989). The location is probably accurate to within a quarter of a mile.
Geology: Reed and Elliott (1970) reported a 3-foot-wide quartz vein containing 10 percent arsenopyrite and lesser chalcopyrite, pyrite, and pyrrhotite in a shear zone cutting upper Mesozoic sedimentary rocks at this locality. In addition to base metal anomalies, samples contain up to 10 ppm silver and 0.1 ppm gold. This mineralized area is about a mile from a small Tertiary granitic intrusive.
Workings: Reconnaissance sampling has been completed in this area (Reed and Elliott, 1970).
Age: Tertiary? Mineralization crosscuts Upper Mesozoic sedimentary rocks. Polymetallic mineralization in this region is commonly associated with Tertiary granitic rocks.
Alteration: Quartz veining.
Commodities (Major) - Cu
Development Status: None
Deposit Model: Polymetallic veins (Cox and Singer, 1986, model 22c)
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
3 valid minerals.
Detailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Chalcopyrite | CuFeS2 |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
Other Databases
| Link to USGS - Alaska: | LH016 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell buried DomainDomain
- Farewell TerranePassive Margin
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